Model: 51KSC6904
This manual provides detailed instructions for the installation, operation, and maintenance of your Kicker KS-Series 6x9 Coaxial Speakers (Model 51KSC6904). Please read this manual thoroughly before attempting installation or operation to ensure proper use and to maximize the performance and longevity of your speakers.
Before beginning installation, please verify that all the following items are included in your package:

Image: Pair of Kicker KS-Series 6x9 Coaxial Speakers with grilles.

Image: One Kicker KS-Series 6x9 Coaxial Speaker with its protective grille.

Image: One Kicker KS-Series 6x9 Coaxial Speaker without its grille, showing the cone and tweeter.

Image: A single protective grille for the Kicker KS-Series 6x9 speaker.

Image: Kicker branded can koozie, included as a bundle accessory.
The Kicker KS-Series speakers feature a thin-mount design, allowing them to fit easily behind most factory grilles and in various vehicle applications. Before mounting, ensure the chosen location provides sufficient clearance for the speaker's depth and diameter.
Use the provided mounting hardware to secure the speakers firmly in place. Avoid over-tightening screws, which can damage the speaker frame.
These speakers have a rated impedance of 4 ohms. Connect the speakers to an amplifier that is stable at a 4-ohm load and provides a recommended power output of up to 150 watts RMS per channel. Ensure correct polarity (+ to + and - to -) when connecting the speaker wires to both the speaker terminals and the amplifier terminals. Incorrect polarity can lead to reduced bass response and poor sound imaging.
It is recommended to use high-quality speaker wire of appropriate gauge (e.g., 16-gauge or thicker) for optimal power transfer and sound quality.
Once installed, connect your audio source to the ampvidador. Comeza co amplifier's gain settings at their minimum and gradually increase them until the desired volume is achieved without distortion. These speakers are designed to deliver clear and detailed audio reproduction across a wide frequency range.
Período de rodaxe: Like many audio components, these speakers may benefit from a break-in period. Play them at moderate volumes for several hours before attempting to play them at their maximum capabilities. This allows the speaker's suspension components to loosen and perform optimally.
If you experience issues with your Kicker KS-Series speakers, refer to the table below for common problems and their solutions:
| Problema | Causa posible | Solución |
|---|---|---|
| Non hai son dos altofalantes | Cableado solto ou desconectado Ampo amplificador non está acendido Incorrect input selection on head unit | Comprobe todos os altofalantes e ampconexións de lifier Verifica amplifier power and fuse Ensure correct audio source is selected |
| Son distorsionado ou pouco claro | Ampganancia do lificador demasiado alta Cortocircuitados os cables dos altofalantes Cono/sonido envolvente do altofalante danado | Reducir ampganancia lifier Inspect wiring for shorts Contact Kicker support for speaker inspection/replacement |
| Graves débiles ou inexistentes | Incorrect speaker polarity Configuración incorrecta do crossover Insuficiente amppotencia lifier | Verify speaker wire polarity Adjust head unit or amplifier crossover settings Garantir amplifier provides adequate power |
| Son intermitente | Conexións soltas Sobrequecemento ampmáis vivo | Check all wiring connections Ensure proper ventilation for amplifier; reduce volume |
| Característica | Especificación |
|---|---|
| Deseño de altofalantes | Coaxial de 2 vías |
| Tamaño do woofer | 6x9 polgadas |
| Tamaño do tweeter | 1 polgadas |
| Impedancia nominal | 4 ohmios |
| Recomendado Amppotencia máis elevada (RMS) | 150 vatios |
| Sensibilidade | 92 dB |
| Resposta en frecuencia | 30-21 kHz |
| Diámetro do orificio de montaxe | 5-11/16 x 8-7/16 inches (14.45 x 21.43 cm) |
| Profundidade de montaxe superior | 3-3/16 polgadas (8.1 cm) |
| Profundidade de montaxe inferior | 3-11/16 polgadas (9.37 cm) |
| Protuberancia do tweeter | 1/16 de polgada (0.16 cm) |
| Material do woofer | Polypropylene with Rubber Surrounds |
| Material do tweeter | Silk-dome |
| Peso do elemento | 15.9 libras (7.21 kg) |
| Dimensións do paquete | 18.63 x 12 x 4.44 polgadas (47.32 x 30.48 x 11.28 cm) |
Kicker products are designed for durability and performance. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Kicker websitio. Garda o comprobante de compra para reclamacións de garantía.
If you require technical assistance, troubleshooting beyond this manual, or warranty service, please contact Kicker customer support through their official website or authorized service centers. Provide your product model number (51KSC6904) and a detailed description of the issue when contacting support.
![]() |
Manual do propietario dos compoñentes do KICKER KSS269 Este manual do propietario ofrece información detallada sobre a instalación e a garantía dos altofalantes de compoñentes KICKER KSS269 da serie KS. Obtén información sobre as especificacións, o cableado, a montaxe e o coidado do produto. |
![]() |
Manual do propietario e guía de instalación dos altofalantes coaxiais KICKER serie KS Manual do propietario dos altofalantes coaxiais KICKER serie KS que detalla as especificacións, a instalación, o cableado, a montaxe e a garantía. Descubra como actualizar o sistema de son do seu vehículo con estes altofalantes de alta eficiencia. |
![]() |
KICKER KS Series Component Speakers Owner's Manual Comprehensive owner's manual for KICKER KS Series component speakers, covering installation, specifications, wiring, mounting, and warranty information. |
![]() |
Altofalantes de compoñentes KICKER serie KS: manual do propietario, guía de instalación e especificacións Manual completo do propietario e guía de instalación para os altofalantes de compoñentes KICKER da serie KS, incluíndo especificacións, diagramas de cableado, instrucións de montaxe, avisos de seguridade e información sobre a garantía. Aprende a instalar e optimizar o sistema de son do teu coche. |
![]() |
Manual do propietario dos altofalantes coaxiais KICKER KM604 Manual completo do propietario para os altofalantes coaxiais KICKER KM604, que detalla as especificacións, a instalación, o cableado, a montaxe e a información sobre a garantía para sistemas de son mariños e para exteriores. |
![]() |
Manual do propietario e guía de instalación dos altofalantes mariños coaxiais KICKER MSC Manual oficial do propietario e guía de instalación para os coaxiais mariños premium KICKER serie MSC. Abarca as especificacións, o cableado, a montaxe, a instalación da grella e a información sobre a garantía para entornos mariños e exteriores. |